Squole (2009)

From the publisher:

You always have room for jell-O? Well, whether or not this is true, it is our hope that you have room for the remarkable squole race in your game. Expanding on the arcane formula that created the gelatinous cube, a species of benevolent slime created human-shaped ambassadors to help prove to the multiverse that not all slime is awful, not all jellies are ochre, and ooze doesn’t have to be a four-letter word…well not a bad one in any case. Not quite human, these mannequin-like slimes take on adventurous tasks to prove their worth, discover the secret to humanity, and generally add a lot of flavor to any campaign. Tailored especially for the 4th edition game, the squole represent the only adventuring ooze that isn’t just a dungeon denizen.